<template>
  <div>
    <el-menu
      default-active="1-4-1"
      class="el-menu-vertical-demo"
      @open="handleOpen"
      @close="handleClose"
      :collapse="isCollapse"
      background-color ="#545c64"
      text-color="#fff"
      active-text-color="#ffd04b"
       :collapse-transition = "false"
    >
    <h3>{{isCollapse?'后台':'后台管理系统'}}</h3>
      <el-menu-item @click="clickMenu(item)" :index="item.path+''" v-for="item in noChildren" :key="item.id">
        <i :class="'el-icon' + '-' + item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </el-menu-item>
      <el-submenu :index="item.path+''" v-for="item in hasChildren" :key="item.id">
        <template slot="title">
          <i :class="'el-icon' + '-' + item.icon"></i>
          <span slot="title">{{ item.label }}</span>
        </template>
        <el-menu-item-group v-for="(Subitem,Subindex) in item.children" :key="Subitem.path" >
          <el-menu-item :index="Subindex+''"  @click="clickMenu(Subitem)" >{{Subitem.label}}</el-menu-item>
        </el-menu-item-group>
      </el-submenu>
    </el-menu>
  </div>
</template>

<script>
import bus from '../components/evenBus.js'
export default {
  
  data() {
    return {
      isCollapse: false,
      menu: [
        {
          path: "/",
          name: "home",
          label: "首页",
          icon: "s-home",
          url: "home/index",
        },
        {
          path: "/mall",
          name: "mall",
          label: "商品管理",
          icon: "video-play",
          url: "mall/index",
        },
        {
          path: "/user",
          name: "user",
          label: "用户管理",
          icon: "user",
          url: "User/index",
        },
        {
          label: "其他",
          icon: "location",
          children: [
            {
              path: "/page1",
              name: "page1",
              label: "页面1",
              icon: "setting",
              url: "other/pageOne",
            },
            {
              path: "/page2",
              name: "page2",
              label: "页面2",
              icon: "setting",
              url: "other/pageTwo",
            },
          ],
        },
      ],
    };
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    clickMenu(item){
      this.$router.push({
      // path:"/"+item.name
      name:item.name
      })
    },
  },
  computed: {
    noChildren() {
      return this.menu.filter((item) => !item.children);
    },
    hasChildren() {
      return this.menu.filter((item) => item.children);
    },
  },
  created(){
    bus.$on('share',val=>{
      this.isCollapse = val
    })
  }
};
</script>
<style scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu{
  height: 100vh;
  border: none;
}
.el-menu h3{
  text-align: center;
  color: #fff;
  line-height: 48px;
}
</style>